Hi,
yes, i create the the VXLAN Interfaces first, then install Cloudstack.
*
vxlan1026 on bridge brdrbd1
*
vxlan1028 on bridge brcsmm1
i think those are good.
the consoleproxy vm is now up.
but the secondarystoragevm still failing.
# Physical Network
Isolation Method: VXLAN
VLAN/VNI: 200-299
Traffic Type: Guest, Management, Public, Storage
Range: Zone
## Traffic Types (Here i don’t know if i have to setup a Label)
# Guest
Network Label: „Use default gateway“
# Management (Should be native on preconfigured Bridge brcsmm1)
Network Label: brcsmm1
Pod1 VLAN/VNI: vlan://untagged
# Public (Here i don’t know if i have to setup a Label, and/or VNI)
Network Label: „Use default gateway“
VLAN/VNI: vxlan://896
# Storage (Should be native on preconfigured Bridge brdrbd1)
Network Label: brdrbd1
Pod1: no VLAN/VNI
Interfaces:
*
lo
*
eno1
*
eno2
*
eno3
*
eno4
*
brdrbd1
*
vxlan1026
*
brcsmm1
*
vxlan1028
*
CS vnet1 (why?)
*
CS cloud0 (guest?)
*
CS vnet0 (why?)
*
CS brvx-896 (public?)
*
CS vnet2 (why?)
*
CS vxlan896
All interfaces in the list starting with CS are created by cloudstack.
Best Regards,
Jan
Von: Júlíus Þór Bess <[email protected]>
Datum: Dienstag, 3. Februar 2026 um 18:47
An: [email protected] <[email protected]>
Betreff: Re: AW: AW: VXLAN-EVPN Bridge Name and Traffic Labels
Also, please show the output of: /ip -d link show dev vxlan1026/
Did you create that vxlan interface before installing cloudstack?
On 2/3/26 2:30 PM, Jan Vöhringer via users wrote:
> Hi,
>
> the vlan script will be executed because in the wizard i used only the
> number, without vxlan:// prefix.
> If no Prefix is given, VLAN will be used. I thought, if i choose type VXLAN,
> the VNI will be used and not the VLAN-ID. (CloudStack 4.21.0.0 )
>
> Because of that, I’m a step further now, but i don’t know how to use the
> Pubic and Guest Traffic as VXLAN on a bridge (without an IP for the
> Hypervisor)
> Should the Guest and Traffic also have a label and/or an VNI (or should i
> create a dedicated bridge for Guest and Public)?
>
> brvx is down until a VXLAN sub-interface is added…
>
>
> [root@kvm01 ~]# brctl show
> bridge name bridge id STP enabled interfaces
> brcsmm1 8000.4ee1bcb57803 no vxlan1028
> brdrbd1 8000.f6bdcd5a28d2 no vxlan1026
> brvx 8000.000000000000 no
>
> [root@kvm01 ~]# ip -br link show
> lo UNKNOWN 00:00:00:00:00:00 <LOOPBACK,UP,LOWER_UP>
> eno1 UP 00:0e:1e:96:a0:40
> <BROADCAST,MULTICAST,UP,LOWER_UP>
> eno2 UP 00:0e:1e:96:a0:42
> <BROADCAST,MULTICAST,UP,LOWER_UP>
> eno3 UP 00:0e:1e:96:a0:44
> <BROADCAST,MULTICAST,UP,LOWER_UP>
> eno4 UP 00:0e:1e:96:a0:46
> <BROADCAST,MULTICAST,UP,LOWER_UP>
> brdrbd1 UP f6:bd:cd:5a:28:d2
> <BROADCAST,MULTICAST,UP,LOWER_UP>
> vxlan1026 UNKNOWN f6:bd:cd:5a:28:d2
> <BROADCAST,MULTICAST,UP,LOWER_UP>
> brcsmm1 UP 4e:e1:bc:b5:78:03
> <BROADCAST,MULTICAST,UP,LOWER_UP>
> vxlan1028 UNKNOWN 4e:e1:bc:b5:78:03
> <BROADCAST,MULTICAST,UP,LOWER_UP>
> brvx DOWN 00:00:00:00:00:00
> <NO-CARRIER,BROADCAST,MULTICAST,UP>
>
> Jan
>
>
> Von: Júlíus Þór Bess<[email protected]>
> Datum: Dienstag, 3. Februar 2026 um 14:20
> An:[email protected] <[email protected]>
> Betreff: Re: AW: VXLAN-EVPN Bridge Name and Traffic Labels
>
> Hi,
>
> Please show the output of "brctl show" and "ip -br link show"
>
> I suspect the GUEST network is inheriting brcsmm1 from Management since
> GUEST is not assigned a label.
>
>
> On 2/3/26 6:31 AM, Jan Vöhringer via users wrote:
>> Hi Júlíus,
>>
>> thank you for your message.
>>
>> i’ve created again a new zone (new DB from scratch) and do following traffic
>> tags:
>>
>> Physical Network 1, Isolation Method: VXLAN
>>
>> *
>> GUEST (without Label)
>> *
>> MANAGEMENT (brcsmm1)
>> *
>> PUBLIC (without Label)
>> *
>> STORAGE (brdrbd1)
>>
>> log show: Error: argument "brvxlan1028-1096" is wrong: "name" not a valid
>> ifname Failed to create br: brvxlan1028-1096
>>
>> Failed to create vnet 1096: Error: argument "brvxlan1028-1096" is wrong:
>> "name" not a valid
>> ifname/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvlan.sh:
>> line 59: /proc/sys/net/ipv6/conf/brvxlan1028-1096/disable_ipv6: No such file
>> or directoryCannot find device "brvxlan1028-1096"Failed to create br:
>> brvxlan1028-1096
>>
>> brvxlan1028-1096 - don’t know why this is used or created, brvxlan1028 is
>> brcsmm1 with subinterface vxlan1028
>> 1096 is my public guest Network, but i didn’t used it in the wizard.
>>
>> and i can’t explain why still modifyvlan instead of modifyvxlan is used.
>> Maybe if NO Traffic Label is set, it uses modifyvlan?
>>
>> Best Regards,
>> Jan
>>
>>
>> Von: Júlíus Þór Bess<[email protected]>
>> Datum: Montag, 2. Februar 2026 um 18:10
>> An:[email protected] <[email protected]>
>> Betreff: Re: VXLAN-EVPN Bridge Name and Traffic Labels
>>
>> Hi Jan,
>>
>> Max ifname length is 15 characters, so yes. The ifname of
>> brvxlan1028-1096 is too long.
>>
>> Did you replace the modify-vxlan.sh with the EVPN-VXLAN version?
>> Otherwise you're using the multicast version.
>>
>> I also notice that the modifyvlan.sh (notice vlan, not vxlan) is
>> executing and trying to create a VLAN on a traditional bridge... That's
>> probably not what you want. What should happen is that modifyvxlan.sh
>> should have created another bridge named brvx1096 which should have a
>> bridge slave of vxlan1096. Names might not be entirely correct but you
>> probably get what I mean.
>>
>> On 2/2/26 4:56 PM, Jan V�hringer via users wrote:
>>> Hi Cloudstack Community,
>>>
>>> i have trouble with the Zone/Welcome Wizard in Cloudstack - the System
>>> VMs are in a deployment/reboot loop.
>>> Maybe because of the wrong or too long Bridge Name for VXLAN with EVPN.
>>>
>>> *
>>> Setup modify sh for VXLAN with EVPN
>>> *
>>> The Hosts have two physical NICs:
>>> o
>>> eno1 = Transfer LAN-1 OSPF 172.16.11.2/30
>>> o
>>> eno2 = Transfer LAN-2 OSPF 172.16.12.2/30
>>> o
>>> lo = Loopback for BGP with EVPN 10.1.0.1/32
>>> o
>>> brdrbd1 = Bridge for DRBD / Linstor Traffic 10.10.26.101 /24
>>> +
>>> vxlan1026 as Subinterface, added by NMCLI
>>> o
>>> brcsmm1 = Bridge for Cloudstack Management Traffic
>>> 10.10.28.101 /24
>>> +
>>> vxlan1028 as Subinterface, added by NMCLI
>>>
>>>
>>> i’m looking for „normal“ VXLAN Bridges like brvxlan2001 for example
>>> customer1...
>>>
>>> After the Wizard completes, the Systems VMs are permanently
>>> rebooted/deployed. And the Wizard create following Interfaces: cloud0
>>> and vxlan1028.1096@vxlan1028
>>>
>>> Log Show (1096 should be the public VXLAN):
>>> "“result”:“false”,“details”:“Failed to create vnet 1096: Error:
>>> argument \"brvxlan1028-1096\" is wrong: \"name\" not a valid ifname...
>>> Cannot find device \"brvxlan1028-1096\" Failed to create br:
>>> brvxlan1028-1096”
>>> Failed to create vnet 1096: Error: argument "brvxlan1028-1096" is
>>> wrong: "name" not a valid
>>> ifname/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvlan.sh:
>>> line 59: /proc/sys/net/
>>> ipv6/conf/brvxlan1028-1096/disable_ipv6: No such file or
>>> directoryCannot find device "brvxlan1028-1096"Failed to create br:
>>> brvxlan1028-1096
>>>
>>>
>>> i’ve following setups without success:
>>> SCR-20260129-kvah.png
>>> and
>>> image.png
>>>
>>> have someone a idea how to create the Interfaces and Traffic Types?
>>>
>>> Best Regards,
>>> Jan
